Why do cars overtake on the right but on escalators people overtake on the left?

Question

On London Underground?

Answer 1

because the speakers are yelling "keep to the right" and most people are right handed so will naturally gravitate to the right to hold the banister with thier right hand.

Answer 2

Because most people stay on the right side of the escalator because most people are right handed and can hold on better.

Answer 3

I would not dream of holding on to the rail on any escalator, how many times do people need reminding of other peoples bad toilet habits !

Answer 4

Can we say not so smart people ????